My brother is returning his iPod Classic, and he'll be using my 40GB iPod Photo instead. Our experience with the 80GB Silver Classic is that it's absolutely horrible, and that none of the software "upgrades" are worth anything at all.
Apple came to the end of how much they could improve on the click wheel iPod, so instead of letting it stay as is, or moving onto something new, they spurt out this horribly slow, full of unnecessary features, operating system. You can only see four albums per screen now, instead of nine, because Apple thought it would be a brilliant idea to let you see the album artwork next to each album, even though it's so small you can barely see it, but it's big enough to limit the amount of albums you can see per page from 9 to 4. Brilliant.
The battery does not last for 30 hours, unless you're exclusively playing audio, with the backlight off. Anything else drastically reduces battery life, due to the complexity of the Operating System.
I give the iPod Classic a 2/5.